Despite the recent decline in the prevalence of ransomware in the threat landscape, Cisco Talos has been monitoring the now widely distributed ransomware called Gandcrab. Gandcrab uses both traditional spam campaigns, as well as multiple exploit kits, including Rig and Grandsoft. While we’ve seen cryptocurrency miners overtake ransomware as the most popular malware on the threat landscape, Gandcrab is proof that ransomware can still strike at any time.
While investigating a recent spam campaign Talos found a series of compromised websites that were being used to deliver Gandcrab. This malware is the latest in a long line of examples of why stopping malware distribution is a problem, and shows why securing websites is both an arduous and necessary task. As a clear example of how challenging resolving these issues can be, one of the sites — despite being shut down briefly — was seen serving Gandcrab not once, but twice, over a few days.